Forming method of a PVB film for HUD
AssigneeSaint-Gobain Glass France
InventorXiaofeng Guo
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Abstract
A PVB film for HUD, a forming mold and a forming method thereof are presented. The accuracy error of HUD imaging achieved by the PVB film for HUD is ±0.1 mrad. The forming mold includes an upper mold and a lower mold, the two of which can form an enclosed mold cavity when clamped together, wherein protective films are disposed on inner surfaces of the upper mold and the lower mold, respectively, for supporting PVB material and preventing the PVB material from bonding with the upper mold and the lower mold, and wherein shapes of the protective films match shapes of the upper mold and the lower mold.
Claims11
A forming method of a PVB film for HUD, comprising the following steps:
- (a) sandwiching PVB material between two protective films, and then placing the PVB material into a pre-heated mold;
- or placing a first protective film of the two protective films into the pre-heated mold, and then placing the PVB material onto the first protective film, and finally placing a second protective film of the two protective films onto the PVB material;
- (b) clamping the mold;
- (c) pressurizing the mold and heating the mold to a desired temperature;
- (d) taking out a formed PVB film along with the two protective films;
- (e) cooling the formed PVB film;
- and
- (f) peeling the two protective films and obtaining the PVB film for HUD.
Dependencies are inferred from the claim text.